Tech Couch

Understanding permissions on linux files and directories

Defining who can access what on the filesystem

Setting up Grafana to monitor Kubernetes metrics and logs

Combining Grafana, Prometheus and Loki for a robust monitoring stack

Managing users on linux

A guide on users, groups and authentication

Forwarding docker container logs to Grafana Loki

Advanced log processing for local container environments

Brute-forcing logins with hydra: Attack and defense

How an attacker would crack a login, and how to protect against it

Basic geospatial queries in postgres

Geographic distance search without needing PostGIS

Understanding computer storage units and transfer speeds

Making sense of Gb, GB, GiB, Gbps and GBps

A Practical Guide to Linux Disk Encryption

Keeping disk contents safe from prying eyes

Editing files with nano

Terminal file-editing made easy

Understanding bash stream redirection

Controlling the flow of data in and out of programs